LTC3441
13
3441fc
For more information www.linear.com/LTC3441
Typical applicaTions
Li-Ion to 3.3V at 1.2A Converter
Efficiency
SW1
PV
IN
V
IN
SHDN/SS
MODE/SYNC
PGND
5
8
12
11
2
6
4
9
10
1
7
3
SW2
V
OUT
FB
V
C
GND
PGND
LTC3441
C1
10µF
*1 = Burst Mode OPERATION
0 = FIXED FREQUENCY
C1: TAIYO YUDEN JMK212BJ106MG
C2: TAIYO YUDEN JMK325BJ226MM
D1, D2: ON SEMICONDUCTOR MBRM120LT3
L1: TOKO A916CY-3R3M
2.8V TO 4.2V
Li-Ion
D2
*
R3 15k
R1
340k
C2
22µF
V
OUT
3.3V
1.2A
R2
200k
C4 1.5nF
3441 TA03a
L1
4.7µH
D1
I
OUT
(mA)
0.1
40
EFFICIENCY (%)
50
60
70
80
1 10 10000100 1000
3441 TA03b
30
20
10
0
90
100
4.2V
IN
PWM
4.2V
IN
BURST
3.6V
IN
PWM
2.8V
IN
PWM
Li-Ion to 5V at 600mA Boost Converter with Output Disconnect
SW1
PV
IN
V
IN
SHDN/SS
MODE/SYNC
PGND
5
8
12
11
2
6
4
9
10
1
7
3
SW2
V
OUT
FB
V
C
GND
PGND
LTC3441
C1
10µF
0.047µF
*1 = Burst Mode OPERATION
0 = FIXED FREQUENCY
C1: TAIYO YUDEN JMK212BJ106MG
C2: TAIYO YUDEN JMK325BJ226MM
D1: MBRM120LT3
L1: TOKO A916CY-4R7M
2.5V TO 4.2V
Li-Ion
*
R3 15k
R1
619k
C
OUT
22µF
V
OUT
5V
600mA
R2
200k
C4 1.5nF
3441 TA04a
L1
4.7µH
D1
1M
Efficiency
OUTPUT CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.1 10 100 1000
3441 TA04b
0
1
Burst Mode
OPERATION
V
IN
= 2.7V
V
IN
= 4.2V
V
IN
= 3.6 V
LTC3441
14
3441fc
For more information www.linear.com/LTC3441
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
package DescripTion
4.00 ±0.10
(2 SIDES)
3.00 ±0.10
(2 SIDES)
NOTE:
1. DRAWING PROPOSED TO BE A VARIATION OF VERSION
(WGED) IN JEDEC PACKAGE OUTLINE M0-229
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON THE TOP AND BOTTOM OF PACKAGE
0.40 ±0.10
BOTTOM VIEW—EXPOSED PAD
1.70 ±0.10
0.75 ±0.05
R = 0.115
TYP
R = 0.05
TYP
2.50 REF
16
127
PIN 1 NOTCH
R = 0.20 OR
0.35 × 45°
CHAMFER
PIN 1
TOP MARK
(NOTE 6)
0.200 REF
0.00 – 0.05
(UE12/DE12) DFN 0806 REV D
2.50 REF
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
2.20 ±0.05
0.70 ±0.05
3.60 ±0.05
PACKAGE OUTLINE
3.30 ±0.10
0.25 ±0.05
0.50 BSC
1.70 ±0.05
3.30 ±0.05
0.50 BSC
0.25 ±0.05
DE/UE Package
12-Lead Plastic DFN (4mm × 3mm)
(Reference LTC DWG # 05-08-1695 Rev D)
Please refer to http://www.linear.com/product/LTC3441#packaging for the most recent package drawings.
LTC3441
15
3441fc
For more information www.linear.com/LTC3441
revision hisTory
REV DATE DESCRIPTION PAGE NUMBER
B 8/14 Modified filter pole equation in Closing the Feedback Loop section 11
C 10/16 Added equation to calculate V
OUT
Modified Operating Frequency Selection section
6
11
(Revision history begins at Rev B)

LTC3441EDE#PBF

Mfr. #:
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators Hi C uP Sync Buck-Boost DC/DC Conv
Lifecycle:
New from this manufacturer.
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